<template>
  <div class="component-upload-image">
    <el-checkbox-group v-show="false" v-model="fileList">
    </el-checkbox-group>
    <el-upload
        multiple
        :accept="accept"
        :disabled="disabled"
        :action="uploadImgUrl"
        list-type="picture-card"
        :on-success="handleUploadSuccess"
        :before-upload="handleBeforeUpload"
        :on-change="handleChange"
        :limit="limit"
        :on-error="handleUploadError"
        :on-exceed="handleExceed"
        ref="imageUpload"
        :on-remove="handleDelete"
        :show-file-list="true"
        :headers="headers"
        :file-list="fileList"
        :on-preview="handlePictureCardPreview"
        :class="{
                hide: this.fileList.length >= this.limit,
                uoloadSty: showBtnDealImg,
                disUoloadSty: noneBtnImg,
                hideRight: disabled,
            }"
    >
      <i class="el-icon-plus"
      ><span
          style="
                        display: block;
                        color: #0084ff;
                        font-size: 12px;
                        position: relative;
                        top: 12px;
                    "
      >{{ info }}</span
      ></i
      >

      <div class="file-wrap" slot="file" slot-scope="{ file }">
        <div
            class="flex-colum-center file-name"
            v-if="isFile(file.url)"
        >
          <img
              style="width: 24px; height: 24px"
              src="../../assets/images/file_word.png"
          />
          <span class="file-name_inline">{{ file.fileName }}</span>
        </div>

        <img
            v-else
            class="el-upload-list__item-thumbnail"
            :src="file.url"
            alt=""
        />
        <span class="el-upload-list__item-actions">
                    <span
                        v-if="canOpen(file)"
                        class="el-upload-list__item-preview"
                        @click="handlePictureCardPreview(file)"
                    >
                        <i class="el-icon-zoom-in"></i>
                    </span>
                    <span
                        class="el-upload-list__item-delete"
                        @click="handleDownload(file)"
                    >
                        <i class="el-icon-download"></i>
                    </span>
                    <span
                        v-if="!disabled"
                        class="el-upload-list__item-delete"
                        @click="handleDelete(file, fileList)"
                    >
                        <i class="el-icon-delete"></i>
                    </span>
                </span>
      </div>
    </el-upload>
    <span
        v-if="
                disabled &&
                (fileList === undefined ||
                    fileList === null ||
                    fileList == '' ||
                    fileList == [])
            "
    >--</span
    >

    <!-- 上传提示 -->
    <div class="el-upload__tip" slot="tip" v-if="showTip">
      <template v-if="fileSize">
        请上传大小不超过
        <b style="color: #f56c6c">{{ fileSize }}MB</b></template
      >
      <template v-if="fileType">
        格式为 <b style="color: #f56c6c">{{ fileType.join("/") }}</b
      >的文件,</template
      >
      <template v-if="fileType">
        最多 <b style="color: #f56c6c">{{ limit }}份</b></template
      >
    </div>

    <el-dialog
        :visible.sync="dialogVisible"
        title="预览"
        width="70%"
        append-to-body
    >


      <template v-if="isFile(dialogImageUrl)">
        <el-input
            v-if="isTxt"
            :autosize="{ minRows: 8, maxRows: 15 }"
            v-model="txtContent"
            placeholder=""
            readonly
            type="textarea"
        ></el-input>


        <vue-office-docx
            v-else-if="isDoc"
            :src="dialogImageUrl"
            style="height: 100vh;"
        />

        <vue-office-excel
            v-else-if="isExcel"
            :src="dialogImageUrl"
            style="height: 100vh;"
        />

        <iframe
            v-else
            :src="dialogImageUrl"
            frameborder="1"
            width="100%"
            height="600"
        >
          <head>
            <meta
                http-equiv="Content-Type"
                content="text/html; charset=UTF-8"
            />
          </head>
        </iframe>
      </template>

      <img
          v-else
          :src="dialogImageUrl"
          style="display: block; max-width: 100%; margin: 0 auto"
      />
    </el-dialog>
  </div>
</template>

<script>
import { getToken } from "@/utils/auth";
import { listByIds, delOss, downFile } from "@/api/system/oss";
//引入VueOfficeDocx组件
import VueOfficeDocx from '@vue-office/docx'
//引入相关样式
import '@vue-office/docx/lib/index.css'
//引入VueOfficeExcel组件
import VueOfficeExcel from '@vue-office/excel'
//引入相关样式
import '@vue-office/excel/lib/index.css'

export default {
  components:{
    VueOfficeDocx,
    VueOfficeExcel
  },
  props: {
    upType: {
      type: Number,
      default: 1, //0图片 1文件  2图片+文件
    },
    info: {
      type: String,
      default: "请选择",
    },
    value: {
      type: [String, Object, Array],
      default: () => {
        return [];
      },
    },
    // 图片数量限制
    limit: {
      type: Number,
      default: 20,
    },
    // 大小限制(MB)
    fileSize: {
      type: Number,
      default: 50,
    },
    // 文件类型, 例如['png', 'jpg', 'jpeg']
    fileType: {
      type: Array,
      default: () => ["doc", "docx"],
    },
    // 是否显示提示
    isShowTip: {
      type: Boolean,
      default: false,
    },
    disabled: {
      type: Boolean,
      default: false,
    },
  },
  data() {
    return {
      showBtnDealImg: true,
      noneBtnImg: false,
      number: 0,
      uploadList: [],
      dialogImageUrl: "",
      dialogVisible: false,
      hideUpload: false,
      // baseFileUrl: 'http://view.xdocin.com/xdoc?_xdoc=',
      baseFileUrl: "https://view.officeapps.live.com/op/view.aspx?src=",
      baseUrl: process.env.VUE_APP_BASE_API,
      uploadImgUrl: process.env.VUE_APP_BASE_API + "/contractTemplate/contractTemplate/previewFile", // 上传的图片服务器地址
      headers: {
        Authorization: "Bearer " + getToken(),
      },
      fileList: [],
      img: ".png, .jpg, .jpeg, .bmp, .gif, .webp, .psd, .svg, .tiff",
      file: ".doc, .docx, .xls, .xlsx, .ppt, .pptx, .txt, .pdf, .csv, .ftr, .mov, .mp4, .msg",
      unKnowFile: ".csv, .ftr, .mov, .mp4, .msg, .ppt, .pptx, doc",//不支持预览的文件类型
      txtContent: "",
      isTxt: false,
      isDoc: false,
      isExcel: false,
    };
  },
  watch: {
    value: {
      async handler(val) {
        if (val) {
          // 首先将值转为数组
          let list;
          if (Array.isArray(val)) {
            list = val;
          } else {
            await listByIds(val).then((res) => {
              list = res.data;
            });
          }

          // 然后将数组转为对象数组
          this.fileList = list.map((item) => {
            // 此处name使用ossId 防止删除出现重名
            item = {
              name: item.ossId,
              url: item.url,
              ossId: item.ossId,
              fileName: item.originalName,
            };
            return item;
          });
          this.noneBtnImg =
              this.disabled || this.fileList.length >= this.limit;
        } else {
          this.fileList = [];
          this.noneBtnImg =
              this.disabled || this.fileList.length >= this.limit;
          return [];
        }
      },
      deep: true,
      immediate: true,
    },
  },
  computed: {
    // 是否显示提示
    showTip() {
      return this.isShowTip && (this.fileType || this.fileSize);
    },
    accept() {
      const all = this.img + ", " + this.file;

      return this.upType == 2
          ? all
          : this.upType == 1
              ? this.file
              : this.img;
    },
  },
  methods: {
    isFile(url) {
      let fileExtension = url.slice(url.lastIndexOf(".") + 1);
      return this.file.indexOf(fileExtension) >= 0;
    },
    handleChange(file, fileList) {
      this.noneBtnImg = this.disabled || fileList.length >= this.limit;
    },
    // 上传前loading加载
    handleBeforeUpload(file) {
      if (this.disabled) {
        return;
      }

      let isImg = false;
      if (this.fileType.length) {
          let fileExtension = "";
          if (file.name.lastIndexOf(".") > -1) {
              fileExtension = file.name.slice(file.name.lastIndexOf(".") + 1);
          }
          isImg = this.fileType.some((type) => {
              if (fileExtension && fileExtension.indexOf(type) > -1) return true;
              return false;
          });
      } else {
          isImg = file.type.indexOf("image") > -1;
      }

      if (!isImg) {
          this.$modal.msgError(`文件格式不正确, 请上传${this.fileType.join("/")}图片格式文件!`);
          return false;
      }
      if (this.fileSize) {
        const isLt = file.size / 1024 / 1024 < this.fileSize;
        if (!isLt) {
          this.$modal.msgError(`大小不能超过 ${this.fileSize} MB!`);
          return false;
        }
      }
      this.$modal.loading("正在上传，请稍候...");
      this.number++;
    },
    // 文件个数超出
    handleExceed() {
      this.$modal.msgError(`上传文件数量不能超过 ${this.limit} 个!`);
    },
    // 上传成功回调
    handleUploadSuccess(res, file) {
      if (res.code === 200) {
        this.$message.success('上传成功')
        this.uploadList.push({name: res.data.fileName, url: res.data.url, ossId: res.data.ossId});
        this.uploadedSuccessfully(res.data);
      } else {
        this.$message.error('上传失败')
        this.number--;
        this.$modal.closeLoading();
        this.$modal.msgError(res.msg);
        this.$refs.imageUpload.handleRemove(file);
        // this.uploadedSuccessfully(res.data);
      }
    },
    handleDownload(file) {
      console.log("文件---", file);
      this.$download.oss(file.ossId);
    },
    // 删除图片
    handleDelete(file, fileList) {
      this.noneBtnImg = this.disabled || fileList.length >= this.limit;
      const findex = this.fileList.map((f) => f.name).indexOf(file.name);
      if (findex > -1) {
        let ossId = this.fileList[findex].ossId;
        delOss(ossId);
        this.fileList.splice(findex, 1);
        this.$emit("input", this.listToString(this.fileList));
      }
    },
    // 上传失败
    handleUploadError(res) {
      this.$modal.msgError("上传失败，请重试");
      this.$modal.closeLoading();
      this.$emit("uploadEnd", "error");
    },
    // 上传结束处理
    uploadedSuccessfully(data) {
      console.log('data',data)
      if (this.number > 0 && this.uploadList.length === this.number) {
        this.fileList = this.fileList.concat(this.uploadList);
        this.uploadList = [];
        this.number = 0;
        this.$emit("input", this.listToString(this.fileList));
        this.$emit('uploadSuccess', data)
        this.$modal.closeLoading();
      }
    },

    rentContractUrl(url) {
      let that = this;
      this.isTxt = false;
      this.isDoc = false;
      this.isExcel = false;
      if (this.isFile(url)) {
        let fileExtension = url.slice(url.lastIndexOf(".") + 1);
        if (fileExtension == "pdf" || fileExtension == "PDF") {
          return url;
        } else if (fileExtension == "txt" || fileExtension == "TXT") {
          this.isTxt = true;
          downFile(url).then((res) => {
            const reader = new FileReader();

            reader.onload = function () {
              that.txtContent = reader.result;
            };
            reader.readAsText(res);
          });
          return url;
        } else if (fileExtension == "doc" || fileExtension == "docx" || fileExtension == "DOC" || fileExtension == "DOCX") {
          this.isDoc = true;
          return url;
        } else if (fileExtension == "xls" || fileExtension == "xlsx" || fileExtension == "XLS" || fileExtension == "XLSX") {
          this.isExcel = true;
          return url;
        } else {
          return this.baseFileUrl + encodeURIComponent(url);
        }
      } else {
        return url;
      }
    },

    // 预览
    handlePictureCardPreview(file) {
      this.dialogVisible = true;
      this.dialogImageUrl = this.rentContractUrl(file.url);
      console.log("this.dialogImageUrl", this.dialogImageUrl);
    },

    //是否能预览
    canOpen(file){
      let fileExtension = file.url.slice(file.url.lastIndexOf(".") + 1);
      return this.unKnowFile.indexOf(fileExtension.toLowerCase()) < 0
    },

    // 对象转成指定字符串分隔
    listToString(list, separator) {
      let strs = "";
      separator = separator || ",";
      for (let i in list) {
        if (list[i].ossId) {
          strs += list[i].ossId + separator;
        }
      }
      return strs != "" ? strs.substr(0, strs.length - 1) : "";
    },
  },
};
</script>
<style>
.uoloadSty .el-upload--picture-card {
  width: 110px;
  height: 110px;
  line-height: 110px;
}

.disUoloadSty .el-upload--picture-card {
  display: none; /* 上传按钮隐藏 */
}
</style>
<style scoped lang="scss">
::v-deep.hideUpload .el-upload--picture-card {
  display: none;
}

::v-deep .el-upload--picture-card {
  width: 104px;
  height: 104px;
  line-height: 104px;
}

::v-deep .el-upload-list--picture-card .el-upload-list__item {
  width: 104px;
  height: 104px;
}

// 去掉动画效果
::v-deep .el-list-enter-active,
::v-deep .el-list-leave-active {
  transition: all 0s;
}

::v-deep .el-list-enter,
.el-list-leave-active {
  opacity: 0;
  transform: translateY(0);
}

.component-upload-image {
  margin-right: 15px;
}

.hideRight {
  ::v-deep .el-upload-list__item-status-label {
    display: none !important;
  }
}

.file-name {
  text-align: center;
  font-size: 12px;
  margin: 10px 5px;
  word-break: break-all;
  padding: 6px 5px;

  .file-name_inline {
    line-height: 1.5;
    margin-top: 6px;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
  }
}

.file-wrap {
  width: 100%;
  height: 100%;
}

::v-deep .el-upload-list--picture-card .el-upload-list__item,
.is-success {
  margin: 0 8px -2px 0 !important;
}
</style>

